CN219626541U - Dual-redundancy low-pressure switch - Google Patents

Abstract

The utility model discloses a dual-redundancy low-pressure switch, which comprises a lower part and an upper part, wherein the lower part comprises a middle shell, a diaphragm and a lower shell, the diaphragm is arranged between the middle shell and the lower shell, the middle shell and the lower shell are welded and fixed along the circumference through laser welding, a guide sleeve II, a diaphragm top seat, a main spring and a guide sleeve I are sequentially arranged at an opening at the upper end of the middle shell, the guide sleeve II is fixed on the inner wall of the middle shell, the guide sleeve I and the guide sleeve II are fixedly connected through a screw II, the upper end of the diaphragm top seat is inserted into the guide sleeve I, the lower end of the diaphragm top seat is abutted against the diaphragm, the main spring is arranged between the guide sleeve I and the diaphragm, and the upper part comprises an upper shell and a micro switch; the double-spring debugging structure is utilized to carry out pressure debugging on the low-pressure switch, so that the pressure switch is easier to debug successfully and is more stable.

Description

Dual-redundancy low-pressure switch

Technical Field

The utility model relates to the technical field of low-pressure switches, in particular to a dual-redundancy low-pressure switch.

Background

The low pressure switch is used for detecting the oil supply pressure in the system, and when the system pressure is lower than a certain pressure, the alarm indicator lamp indicates that the system pressure of the related personnel is too low. The working principle of the low-pressure switch is that the internal pressure sensing element is driven by the magnitude of hydraulic pressure, then the micro switch contacts are controlled to be opened and closed by the acting force of the pressure sensing element to make a circuit on-off, an indicator lamp is externally connected, and related personnel are prompted by the on-off of the indicator lamp. The existing low-pressure switch structure adopts a spring guide post to directly contact with a micro switch contact, so that the contact force is not convenient to adjust, and the assembly and the debugging of products are not facilitated; because the micro switch in the low pressure switch is a main electronic component, if the micro switch is damaged, the low pressure switch can lose the alarming function, so that when the system pressure is too low, the system pressure can not be found in time, and the damage factors such as poor lubrication, increased wear ratio, reduced compression ratio, reduced power and the like of the hydraulic system can be caused as a result. Therefore, a dual redundancy low pressure switch is highly desirable to ensure the safety and reliability of the system.

Disclosure of Invention

The utility model aims to overcome the prior art, and provides a dual-redundancy low-pressure switch, wherein a dual-spring debugging structure is utilized to carry out pressure debugging on the low-pressure switch, so that the pressure switch is easier to debug successfully and more stable.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a dual-redundancy low-pressure switch, includes lower part and upper part, and lower part includes well casing, diaphragm and lower casing, and the diaphragm sets up between well casing and lower casing, just well casing passes through laser welding with lower casing and follows circumference welded fastening, and well casing upper end opening has packed into uide bushing II, diaphragm footstock, main spring and uide bushing I in proper order, and uide bushing II is fixed on the inner wall of well casing, and uide bushing I passes through screw II fixed connection with uide bushing II, and in the uide bushing I was inserted to the upper end of diaphragm footstock, the lower extreme is contradicted on the diaphragm, main spring sets up between uide bushing I and diaphragm, and upper part includes casing and micro-gap switch, and micro-gap switch installs in last casing, and the lower extreme of going up the casing is fixed with the flexible piece, and the upper end of diaphragm footstock passes through flexible piece and micro-gap switch's contact.

Further, the lower end of the upper shell is inserted into the middle shell and fixedly connected with the inner wall of the shell, a baffle is fixed on the inner wall of the upper shell, and the micro switch is fixed on the baffle through screws.

Further, the upper end of the upper shell is provided with an electric socket, the number of the micro switches is two, the micro switches are respectively connected with the electric socket through wires, and the inside of the upper shell is provided with a rubber separation plate which separates the micro switches from the electric socket.

Further, two flexible sheets are arranged, one ends of the upper flexible sheet and the lower flexible sheet are fixed and welded on one side of the lower end of the upper shell, an opening is formed in the other end of the upper end, the upper end of the membrane footstock is abutted against the flexible sheet below, and the flexible sheet above is in contact with the micro switch contact.

Further, a spring top seat, a fine tuning spring and an adjusting screw plug are sequentially arranged in a central hole at the lower end of the lower shell, the spring top seat is abutted against the diaphragm, and a sealing ring is arranged on the outer surface of the lower portion of the lower shell.

Compared with the prior art, the utility model has the beneficial effects that:

utilize two spring debugging structures, carry out pressure debugging to low pressure switch, make pressure switch debug more easily successfully and more stable, this structure utilizes the combination of two micro-gap switches, can not lose alarming function because of the damage inefficacy of one of them micro-gap switch, makes low pressure switch lose alarming function, has increased a heavy insurance measure, and the double spring structure of main spring and fine setting spring can be adjusted through adjusting the plug screw, makes things convenient for the assembly debugging of product, makes the pressure value of product more accurate.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the upper part structure of the present utility model;

FIG. 3 is a schematic diagram of the electrical receptacle and microswitch wiring of the present utility model;

fig. 4 is a schematic view of the lower part structure of the present utility model.

In the figure: the device comprises a lower part 1, a regulating screw plug 1-1, a fine tuning spring 1-2, a lower shell 1-3, a membrane 1-4, a middle shell 1-5, a spring top seat 1-6, a sealing ring 2, a membrane top seat 3, a main spring 4, a guide sleeve I5, an upper part 6, an upper shell 6-2, a screw I6-3, a micro switch 6-4, a wire 6-5, an electric socket 6-6, a rubber isolation plate 6-7, a baffle 6-8, a screw II 7, a guide sleeve II 8 and a flexible sheet 9.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: a dual-redundancy low-pressure switch comprises a lower part 1 and an upper part 6, wherein the lower part 1 comprises a middle shell 1-5, a membrane 1-4 and a lower shell 1-3, the membrane 1-4 is arranged between the middle shell 1-5 and the lower shell 1-3, the middle shell 1-5 and the lower shell 1-3 are welded and fixed along the circumference through laser welding, a guide sleeve II 8, a membrane footstock 3, a main spring 4 and a guide sleeve I5 are sequentially arranged at an opening at the upper end of the middle shell 1-5, the guide sleeve II 8 is fixed on the inner wall of the middle shell 1-5, the guide sleeve I5 is fixedly connected with the guide sleeve II 8 through a screw II 7, the upper end of the membrane footstock 3 is inserted into the guide sleeve I5, the lower end is abutted against the membrane 1-4, the membrane 1-4 is subjected to upward pushing force of a fine tuning spring 1-2, the membrane 1-4 overcomes the elasticity of the main spring 4 to push the membrane footstock 3 to move, and then the force is transmitted to the contact of the micro switch 6-4 through the flexible sheet 9 to realize the opening and closing of the micro switch 6-4, the main spring 4 is arranged between the guide sleeve I5 and the membrane 1-4, the upper part 6 comprises an upper shell 6-2 and the micro switch 6-4, the micro switch 6-4 is arranged in the upper shell 6-2, the lower end of the upper shell 6-2 is fixed with the flexible sheet 9, the upper end of the membrane footstock 3 is contacted with the contact of the micro switch 6-4 through the flexible sheet 9, the lower end of the upper shell 6-2 is inserted into the middle shell 1-5 and fixedly connected with the inner wall of the shell 1-5, the baffle 6-8 is fixed on the inner wall of the upper shell 6-2, the micro switch 6-4 is fixed on the baffle 6-8 through screws.

The upper end of the upper shell 6-2 is provided with an electric socket 6-6, the number of the micro switches 6-4 is two, the micro switches 6-4 are respectively connected with the electric socket 6-6 through wires 6-5, the inside of the upper shell 6-2 is provided with a rubber separation plate 6-7, and the rubber separation plate 6-7 separates the micro switches 6-4 from the electric socket 6-6.

The flexible sheet 9 is arranged into two, one ends of the upper flexible sheet 9 and the lower flexible sheet 9 are fixed and welded at one side of the lower end of the upper shell 6-2, an opening is formed at the other end, the upper end of the membrane footstock 3 is in contact with the lower flexible sheet 9, the upper flexible sheet 9 is in contact with the contact of the micro switch 6-4, in the process that the membrane footstock 3 is jacked upwards, the upper flexible sheet 9 is firstly in contact with the lower flexible sheet 9, the lower flexible sheet 9 is deformed upwards to drive the upper flexible sheet 9 to move upwards, and the upper flexible sheet 9 applies pressure to the contact of the micro switch 6-4, so that the opening and closing of the contact are controlled.

The spring top seat 1-6, the fine tuning spring 1-2 and the adjusting screw plug 1-1 are sequentially arranged in the central hole at the lower end of the lower shell body 1-3, the double-spring structure of the main spring 4 and the fine tuning spring 1-2 can be adjusted through the adjusting screw plug 1-1, assembly and debugging of products are facilitated, the pressure value of the products is more accurate, the spring top seat 1-6 is abutted to the membrane 1-4, the sealing ring 2 is arranged on the outer surface of the lower part of the lower shell body 1-3, the sealing effect is achieved through the sealing ring 2, the lower part of the lower shell body 1-3 is connected with a system pipeline, and the sealing ring 2 ensures the sealing performance of a connecting part.

The device is internally provided with 2 micro switches 6-4, and even if one of the micro switches is damaged, the internal circuit can still be conducted by the other micro switch, so that the product can work normally.

When the product hydraulic pressure is lower than the prescribed value, the spring force of main spring 4 is greater than the hydraulic pressure, and diaphragm footstock 3 resets at this moment, and flexible piece 9 atress is reset, and micro-gap switch 6-4 contact resets, and the internal circuit is closed and is switched on, and external connection pilot lamp lights and sends the warning.

In summary, the technical scheme overcomes the risk brought by the single micro switch 6-4, and the damage and failure of the single micro switch 6-4 can not cause the low pressure switch to lose the alarm function so as to lead the product to be more effectively promoted, thereby leading the system to be safe and reliable.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A dual redundancy low pressure switch comprising a lower part (1) and an upper part (6), characterized in that: the lower part (1) comprises a middle shell (1-5), a membrane (1-4) and a lower shell (1-3), wherein the membrane (1-4) is arranged between the middle shell (1-5) and the lower shell (1-3), the middle shell (1-5) and the lower shell (1-3) are fixed through laser welding along circumference welding, a guide sleeve II (8), a membrane top seat (3), a main spring (4) and a guide sleeve I (5) are sequentially arranged at an opening at the upper end of the middle shell (1-5), the guide sleeve II (8) is fixed on the inner wall of the middle shell (1-5), the guide sleeve I (5) is fixedly connected with the guide sleeve II (8) through a screw II (7), the upper end of the membrane top seat (3) is inserted into the guide sleeve I (5), the lower end is abutted against the membrane (1-4), the main spring (4) is arranged between the guide sleeve I (5) and the membrane (1-4), the upper part (6) comprises an upper shell (6-2) and a micro switch (6-4), the micro switch (6-4) is fixed on the upper end of the upper shell (6-2), the upper end of the membrane top seat (3) is contacted with the contact of the micro switch (6-4) through a flexible sheet (9).

2. A dual redundancy low pressure switch as claimed in claim 1, wherein: the lower end of the upper shell (6-2) is inserted into the middle shell (1-5) and fixedly connected with the inner wall of the shell (1-5), a baffle (6-8) is fixed on the inner wall of the upper shell (6-2), and the micro switch (6-4) is fixed on the baffle (6-8) through screws.

3. A dual redundancy low pressure switch as claimed in claim 2, wherein: the utility model discloses a micro-switch, including upper casing (6-2), micro-switch (6-4), electric socket (6-6) are provided with in the upper end of upper casing (6-2), and micro-switch (6-4) are provided in two, and micro-switch (6-4) are connected with electric socket (6-6) through wire (6-5) respectively, the inside of upper casing (6-2) is provided with separates offset plate (6-7), separates offset plate (6-7) and separates micro-switch (6-4) and electric socket (6-6).

4. A dual redundancy low pressure switch as claimed in claim 1, wherein: the two flexible sheets (9) are arranged, one ends of the flexible sheets (9) are fixed up and down, the two flexible sheets are welded on one side of the lower end of the upper shell (6-2), an opening is arranged at the other end of the flexible sheets, the upper end of the membrane top seat (3) is abutted against the flexible sheets (9) below, and the flexible sheets (9) above are in contact with the contacts of the micro switch (6-4).

5. A dual redundancy low pressure switch as claimed in claim 1, wherein: a spring top seat (1-6), a fine tuning spring (1-2) and an adjusting screw plug (1-1) are sequentially arranged in a central hole at the lower end of the lower shell (1-3), the spring top seat (1-6) is in contact with the membrane (1-4), and a sealing ring (2) is arranged on the outer surface of the lower part of the lower shell (1-3).